TROPICS Workshop

The TROPICS WG is a joint group between CLIVAR Climate Dynamics Panel, CLIVAR Pacific Panel, and WCRP CFMIP, with an aim to better understand the mechanisms behind the formation of tropical SST warming patterns across the past, present, and future. We would like to invite you to our first in-person WG workshop, scheduled for September 17-19, 2024 at the Max Planck Institute for Meteorology in Hamburg. The primary objective is to facilitate the exchange of ideas and collaborative brainstorming. We hope this will lead to the initiation of several collaborative projects. The workshop will be organized around three key themes:

(1) Tropical feedbacks in models and observations,

(2) Role of persistent model biases and sensitivity to model resolution,

(3) Remote forcings and teleconnections.

The workshop will involve around 30 people, so expect lots of discussion. The goal is to foster fruitful discussions, so there is no need for a polished conference-style talk. You can choose any presentation format, from a few pages of slides on ongoing work to a more comprehensive talk on a recently published work. Regardless of the format, kindly conclude your presentation with open questions/knowledge gaps/suggestions for future work to stimulate free discussion. Each speaker will be tentatively allocated 20 min for presentation and 20 min for discussion. We will then conclude each day with a synthesis discussion on the proposed future plans on the theme of the day.

The Workshop is hosted by the Max Planck Institute for Meteorology in Hamburg, Germany. The workshop room 022/023 is on the ground floor.

WiFi: Eduroam

Each day will be devoted to a different theme: (1) Tropical feedbacks in models and observations on Day 1, (2) Role of persistent model biases and sensitivity to model resolution on Day 2, (3) Remote forcings and teleconnections on Day 3. Every presenter is assigned to the time slot according their declaration of the theme.

Day 1 (Sep. 17) Activity / presentation Speaker Affiliation
8:30 Registration    
8:45-9:00 Welcome and overview talk Kang, Sarah & Watanabe, Masahiro Max Planck Institute for Meteorology & University of Tokyo
9:00-9:40 Current and future climate trends in the tropical Pacific: from ocean cooling to an El Niño-like state Federov, Alexey Yale University
9:40-10:20 Air-sea feedbacks and atmospheric heat transport strongly damp natural variability in  Indo-Pacific Warm Pool surface temperatures Proistosescu, Cristi University of Illinois
10:20-10:50 Coffee break    
10:50-11:30 Role of the Bjerknes feedback in the projected warming pattern Lengaigne, Matthieu IRD UMR MARBEC
11:30-12:10 Mechanisms of Tropical Pacific decadal variability and tropical Pacific Trends, and role of Atlantic influences Capotondi, Antonietta NOAA, Physical Sciences Laboratory
12:10-12:40 tba Moreno-Chamarro, Eduardo Max Planck Institute for Meteorology
12:40-14:00 Lunch    
14:00-14:40 A simple model of the coupled processes associated with the Tropical Pattern effect Burls, Natalie George Mason University
14:40-15:20 tba Williams, Andrew Princeton University and GFDL
15:20-15:40 Coffee break    
15:40-16:20 Do lower stratospheric/TTL temperature trends affect the Walker Cell? Held, Isaac GFDL
16:20-17:30 Synthesis discussion all  
17:30-open end Icebreaker  



Day 2 (Sep. 18) Activity / presentation Speaker Affiliation
8:30-9:00 Arrival    
9:00-9:40 tba DiNezio, Pedro University of Colorado
9:40-10:20 High-resolution ENSO dynamics and their potential relevance to the global warming pattern Stuecker, Malte University of Hawaii
10:20-10:50 Coffee break    
10:50-11:30 Biases in tropical ocean circulation of possible relevance to the tropical SST warming pattern Karnauskas, Kristopher University of Colorado
11:30-12:10 The role of model mean state bias in shaping the tropical Pacific warming pattern Hu, Shineng Duke University
12:10-13:30 Lunch    
13:30-14:10 Effect of model biases on the projected warming pattern Vialard, Jerôme Institute of Research for Development
14:10-14:50 Tropical mean-state biases, their dependence on resolution, and their relationship with SST trends Jnglin Wills, Robert ETH Zurich
14:50-15:30 Implications of a pervasive climate model bias for low-cloud feedback Ceppi, Paulo Imperial College London
15:30-16:00 tba Olonscheck, Dirk Max Planck Institute for Meteorology
16:00-17:00 Synthesis discussion (with coffee) all


18:00-open end Workshop dinner    


Day 3 (Sep. 19) Activity / presentation Speaker Affiliation
8:30-9:00 Arrival    
9:00-9:40 tba Battisti, David S. University of Washington
9:40-10:20 Teleconnections from the 2023/24 El Niño: Impact of long-term SST trends Deser, Clara NCAR
10:20-10:50 Coffee break    
10:50-11:30 Tropical — high-latitude climate teleconnections England, Matthew University of New South Wales
11:30-12:10 Impacts of Rapid Northern Hemisphere warming on the  Tropical Pacific and Southern Ocean Hwang, Yen-Ting National Taiwan University
12:10-12:40 tba Toda, Masaki Max Planck Institute for Meteorology
12:40-14:00 Lunch    
14:00-14:40 tba McGregor, Shayne Monash University
14:40-15:20 Bridging energy and SST views: Coupled ocean-atmosphere pathways Xie, Shang-Ping Scripps Institution of Oceanography, University of California San Diego
15:20-16:00 tba Collins, Mat University of Exeter
16:00-17:30 Synthesis and final discussion (with coffee) all  
17:30 End    


Considering the demand for accommodation in Hamburg in September, we recommend booking a hotel as soon as possible upon confirming your attendance. Below please find a few suggestions frequently used by visitors to MPI.

Hotel recommendations
1) YoHo - the young hotel (10 min. walk to MPI-M)
Moorkamp 5, 20357 Hamburg
Fon +49 (0) 40 - 28 41 91-0
E-Mail: yoho@we dont want
Code: TROPICS Workshop (valid until 17 June)
2) Ibis Hotel Hamburg City (19 min. by Underground U1/U2) 
Amsinckstr. 3, 20097 Hamburg
Fon +49 (0) 40- 30 99 86-0
Email: h8740-re@we dont want
Code: TROPICS Workshop (valid until 23 July)

3) Premier Inn City Centrum (15 min. by Underground U1/U2) 
Willy-Brandt-Straße 21, 20457 Hamburg
Fon +49 (0) 40 3039 379 0
E-Mail: Hamburg.City@we dont want
Ask for the BUND-Rate!

4) NH Hamburg Mitte (10 min. walk to MPI-M)
Schäferkampsallee 49, 20357 Hamburg
Fon +49 (0) 40 44 11 50
E-Mail: nhhamburgmitte@we dont want
Ask for the BUND-Rate!

(Due to a trade fair in Hamburg, “Premier Inn City Centrum” and “NH Hamburg Mitte” cannot guarantee the more favourable BUND-Rate).

Information about getting to Hamburg can be found here

Transport passes for the week

Tickets for the Hamburg transport network (HVV) can be bought online, in the HVV-App or at the ticket machines found at almost every station.

The network is segmented into rings from A to F. If you don’t plan to travel far outside the city, purchasing regular tickets for zones A and B will certainly suffice.

For the duration of the workshop, a weekly 24/7 ticket might be your cheapest option to travel around Hamburg.


Organizing committee: Sarah Kang, Masahiro Watanabe, Mat Collins, Yen-Ting Hwang, Shayne McGregor, and Malte Stuecker

Should you have any questions, please contact the local organizing committee:

  • Dirk Olonscheck <>
  • Eduardo Moreno-Chamarro <>
  • Elke Lord <>